TY - JOUR
T1 - Refuse-derived fuel and integrated calcium hydroxide sorbent for coal combustion desulfurization
AU - Chu, Sheng
AU - Zhu, Cheng
AU - Tompsett, Geoffrey A.
AU - Mountziaris, T. J.
AU - Dauenhauer, Paul J
N1 - Publisher Copyright:
© 2015 American Chemical Society.
PY - 2015/4/1
Y1 - 2015/4/1
N2 - Pelletized refuse-derived fuel (RDF; 65 wt % nonrecyclable fibers/plastics) and integrated calcium hydroxide sorbent (35 wt %), referred to as a ReEngineered Feedstock (ReEF), were evaluated as a renewable fuel and an in situ sulfur sorbent within pulverized coal combustion. Characterization of ReEF with scanning electron microscopy-energy-dispersive X-ray spectroscopy indicated random distribution of calcium hydroxide sorbents on fiber/plastic particles. The sulfation kinetics of ReEF combustion were evaluated in a drop-tube reactor at variable conditions (800-1000 °C, 1400 ppm of SO2, and 5-30% O2 in N2) with continuous effluent characterization via online IR spectroscopy. Sulfation of calcium hydroxide in ReEF was delayed because of RDF combustion when compared with pure calcium hydroxide sorbent. A low-O2 condition was shown to produce high conversion of calcium hydroxide to calcium sulfate X(Ca(OH)2) > 0.4), while calcination and combustion of ReEF in a high-O2 environment (O2 > 20%) resulted in increased sorbent sintering and reduced total sulfur uptake.
AB - Pelletized refuse-derived fuel (RDF; 65 wt % nonrecyclable fibers/plastics) and integrated calcium hydroxide sorbent (35 wt %), referred to as a ReEngineered Feedstock (ReEF), were evaluated as a renewable fuel and an in situ sulfur sorbent within pulverized coal combustion. Characterization of ReEF with scanning electron microscopy-energy-dispersive X-ray spectroscopy indicated random distribution of calcium hydroxide sorbents on fiber/plastic particles. The sulfation kinetics of ReEF combustion were evaluated in a drop-tube reactor at variable conditions (800-1000 °C, 1400 ppm of SO2, and 5-30% O2 in N2) with continuous effluent characterization via online IR spectroscopy. Sulfation of calcium hydroxide in ReEF was delayed because of RDF combustion when compared with pure calcium hydroxide sorbent. A low-O2 condition was shown to produce high conversion of calcium hydroxide to calcium sulfate X(Ca(OH)2) > 0.4), while calcination and combustion of ReEF in a high-O2 environment (O2 > 20%) resulted in increased sorbent sintering and reduced total sulfur uptake.
UR - http://www.scopus.com/inward/record.url?scp=84926352461&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84926352461&partnerID=8YFLogxK
U2 - 10.1021/acs.iecr.5b00362
DO - 10.1021/acs.iecr.5b00362
M3 - Article
AN - SCOPUS:84926352461
SN - 0888-5885
VL - 54
SP - 3136
EP - 3144
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 12
ER -